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26-0303-57 — PIN,GROOVED,HEADED

✓ Government record, cited
— · NUT WASHER
PRODUCT OVERVIEW

26-0303-57: PIN,GROOVED,HEADED.

The PIN,GROOVED,HEADED is a the manufacturer industrial component. Key specifications include height: 0.100 INCHES NOMINAL IN, diameter: 0.494 INCHES MINIMUM AND 0.497 INCHES MAXIMUM IN, material: STEEL COMP 1018 OVERALL, head_style: FLAT CHAMFER, surface_finish: 125.0 MICROINCHES OVERALL, undercut_width: 0.054 INCHES MINIMUM AND 0.058 INCHES MAXIMUM IN. This part is cataloged in the U.S.

Government catalog under NSN 5315-01-417-3776, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
26-0303-57
NSN: 5315-01-417-3776
FSC: 5315 — Nails, Machine Keys, and Pins
CAGE: 02978 — RENK AMERICA LLC DIV RENK AMERICA (USA)
SPECIFICATIONS
height0.100 INCHES NOMINAL IN
diameter0.494 INCHES MINIMUM AND 0.497 INCHES MAXIMUM IN
materialSTEEL COMP 1018 OVERALL
head_styleFLAT CHAMFER
surface_finish125.0 MICROINCHES OVERALL
undercut_width0.054 INCHES MINIMUM AND 0.058 INCHES MAXIMUM IN
first_end_styleSQUARE
effective_length1.842 INCHES NOMINAL IN
style_designatorGROOVE
pin_head_diameter0.625 INCHES NOMINAL IN
surface_treatmentCADMIUM AND CHROMATE OVERALL
under_head_length2.057 INCHES NOMINAL IN
NSN5315-01-417-3776
COMPONENT DIAGRAM
NUT & WASHER — GRADE MATCHING REQUIRED Hex NUT CROSS-SECTION WASHER OD: — SIZE: — MATERIAL: — PN: 26-0303-57 · OEM ⚠ VERIFY BEFORE ORDERING Grade matters for torque spec — don't mix grades. A Grade 5 nut on a Grade 8 bolt weakens the joint. Lock nuts, wing nuts, and castle nuts are NOT interchangeable with standard hex ✓ BROKER TIP Match nut to bolt thread class and material. Stainless bolt + zinc nut = galvanic corrosion. Always verify finish matches (plain, zinc, hot-dip galvanized) PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
SURFACE FINISH: 125.0 MICROINCHES OVERALL
•
UNDERCUT WIDTH: 0.054 INCHES MINIMUM AND 0.058 INCHES MAXIMUM IN
•
UNDERCUT DIAMETER: 0.432 INCHES MINIMUM AND 0.448 INCHES MAXIMUM IN
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: QQ-P-416 TY FED SPEC SINGLE TREATMENT RESPONSE OVERALL
•
UNDER HEAD LENGTH: 2.057 INCHES NOMINAL IN
•
FIRST END STYLE: SQUARE
•
STYLE DESIGNATOR: GROOVE
•
PIN HEAD DIAMETER: 0.625 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS
SURFACE FINISH125.0 MICROINCHES OVERALL
UNDERCUT WIDTH0.054 INCHES MINIMUM AND 0.058 INCHES MAXIMUM IN
UNDERCUT DIAMETER0.432 INCHES MINIMUM AND 0.448 INCHES MAXIMUM IN
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416 TY FED SPEC SINGLE TREATMENT RESPONSE OVERALL
UNDER HEAD LENGTH2.057 INCHES NOMINAL IN
FIRST END STYLESQUARE
STYLE DESIGNATORGROOVE
PIN HEAD DIAMETER0.625 INCHES NOMINAL IN
DIAMETER0.494 INCHES MINIMUM AND 0.497 INCHES MAXIMUM IN
EFFECTIVE LENGTH1.842 INCHES NOMINAL IN
OTHER ITEMS IN FSC 5315 — Nails, Machine Keys, and Pins
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5315-00-000-1037 5315-00-000-1067 5315-00-000-1245 5315-00-000-1372 5315-00-000-1412 5315-00-001-1571 5315-00-001-1572 5315-00-001-1602
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 26-0303-57?
26-0303-57 is a PIN,GROOVED,HEADED.
What is the NSN for 26-0303-57?
26-0303-57 is cataloged in the U.S. Government catalog under NSN 5315-01-417-3776. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.